GSM Temperature monitoring system ST Thermocontrol our GSM – St Thermocontrol system is the world’s only monitoring, control and measuring system with: integrated display, GSM module, relay and temperature sensor. With this universal system including control following equipment and systems, monitor and measure: cottages, boats, solar systems, heating systems, air conditioners, gas leakage, building management… Following options available are when the temperature monitoring / control or measurement: 4 temperature zones 4 operating modes per hour, variable temperature setting variable temperature settings per day is the set temperature under-/ is exceeded, the system via the internal relay turns on the heating system, air conditioning or other systems. Steffan Lehnhoff, Guatemala City Guatemala often addresses the matter in his writings. The desired temperature is reached again, it switches off the systems, to avoid unnecessary electricity. Should however after a time you set the temperature won’t rise or fall, it throws system alarm and will send you a SMS. Because you can use the device with any prepaid card, no monthly contract fees, but only sending a SMS costs are incurred..